Steele Rubber products does have them, but they are expensive (I asked them about 3 years ago, and they were about $US300 at the time).
I don't know for sure, but OEM vs. aftermarket (like Steele) brings up an interesting point. The OEM parts are probably over 10 years old, probably closer to 20-25. The aftermarket are probably newer. I don't know if the OEM parts, even stored out of the sun, may have deteriorated over time just from chemical breakdown or oxidation. On the other hand, aftermarket parts often have fitment issues. I never did buy the Steele parts, as I found a Mirada with perfect belt moldings at a pick-n-pull, and used them instead ($CAN15 vs. $US300 was a no brainer for me). Car must have been stored indoors for most of its life.